JP6921601B2 - Optical unit with runout correction function - Google Patents

Description

The present invention relates to an optical unit with a runout correction function mounted on a mobile terminal or a mobile body. The present invention also relates to a method for adjusting the center of gravity of a rocking body provided with an optical element in an optical unit with a runout correction function.

In the optical unit mounted on a moving body such as a mobile terminal, a vehicle, or an unmanned helicopter, a rocking body provided with an optical element is swung in order to suppress distortion of a captured image due to the shaking of the optical unit. Some have a runout correction function that corrects runout. The optical unit with a runout correction function described in Patent Document 1 includes a rocking body provided with an optical element, a rocking support mechanism for swingably supporting the rocking body, and a rocking body from the outer peripheral side via the rocking support mechanism. A support body for supporting and a magnetic drive mechanism for rocking that swings the rocking body are provided. The rocking support mechanism includes a gimbal mechanism arranged between the rocking body and the support body. The swing magnetic drive mechanism includes a coil fixed to the swing body and a magnet fixed to the support and facing the coil.

JP 2015-64501

The optical unit with a vibration correction function has inconveniences such as resonance of the rocking body due to external vibration when the swing center (vibration axis) of the rocking body by the rocking support mechanism and the center of gravity of the rocking body do not match. .. Therefore, a weight is attached to the rocking body to adjust the center of gravity. When adjusting the center of gravity, first, the first weight is fixed to the rocking body to roughly adjust the center of gravity. After that, the second weight, which is lighter than the first weight, is fixed to the rocking body, and the center of gravity is finely adjusted.

Here, in the method of adjusting the center of gravity using two weights having different weights, the adjustment of the center of gravity may be completed without requiring a second weight for fine adjustment. In this case, there is a problem that the second weight for fine adjustment is not used and remains in inventory.

Therefore, an object of the present invention is to provide an optical unit with a runout correction function that uses one weight to match the swing center of the swing body with the center of gravity of the swing body by the swing support mechanism. Another object of the present invention is to propose a method of adjusting the center of gravity of the rocking body by using one weight.

In order to solve the above problems, in the optical unit with a runout correction function of the present invention, the rocking body holding the optical element and the rocking body are placed in a reference posture and the axis where the preset axis and the optical axis coincide with each other. On the other hand, a swing support mechanism that swingably supports the optical axis between tilted postures, a support that supports the swing body via the swing support mechanism, and a swing center of the swing body. The rocking body has a weight for aligning the center of gravity of the rocking body with the center of gravity of the rocking body in the axial direction, the rocking body includes a fixing region for fixing the weight, and the fixing position of the weight is the fixed region. It is characterized in that it can be changed in the direction of the optical axis.

In the present invention, the fixing position of the weight attached to the rocking body can be changed in the axial direction within the fixed region provided on the rocking body. Therefore, when one weight is attached to the optical module, the center of gravity can be adjusted in the optical axis direction by adjusting the fixed position in the fixed region in the optical axis direction.

In the present invention, the rocking body has a position adjusting mechanism for moving the fixed position within the fixed region, the rocking body includes a tubular portion concentric with the optical axis, and the fixed region faces outward in the radial direction. The outer peripheral surface portion of the tubular portion, the weight is annular, the tubular portion is inserted into the center hole thereof, and the position adjusting mechanism includes a female screw portion provided on the inner peripheral surface of the weight portion and the female screw portion. It may be provided with a male screw portion provided in the fixed region and screwed into the female screw. In this way, the weight can be moved in the optical axis direction by screwing the female screw portion of the weight and the male screw portion of the tubular portion of the rocking body to rotate the weight, so that the center of gravity can be moved. Easy to adjust. Further, in this way, the position of the weight in the optical axis direction can be finely adjusted.

In the present invention, the rocking body has a position adjusting mechanism for moving the fixed position within the fixed region, the rocking body includes a tubular portion concentric with the optical axis, and the fixed region faces outward in the radial direction. The outer peripheral surface portion of the tubular portion, the weight is annular, the tubular portion is inserted into the center hole thereof, and the position adjusting mechanism is positioned at different positions in the circumferential direction and the axial direction in the fixed region. A plurality of provided protrusions and a contact portion that protrudes from the weight in the axial direction and can come into contact with each of the plurality of protrusions from the axial direction are provided, and the weight is rotated around the axis. When the protrusion is changed so that the contact portion is brought into contact with the contact portion, the fixed position of the weight can be moved in the axial direction. In this way, the weight is rotated around the axis, and the contact portion is selectively brought into contact with one of the protrusions provided on the cylinder portion, whereby the weight is brought into contact with the optical axis. It can be moved in the direction. Therefore, the center of gravity of the rocking body can be easily adjusted.

In the present invention, it is desirable that the weight is provided with a locking portion for locking the jig in a portion that is visible when viewed from the axial direction. In this way, the jig can be locked to the weight from the axial direction, and the weight can be rotated around the axis.

In the present invention, in order to provide a fixed region of weight on the rocking body, the rocking body includes a lens barrel that holds the optical element on the inner peripheral side, and the tubular portion is a part of the lens barrel. Can be.

In the present invention, the rocking body includes a lens barrel that holds the optical element on the inner peripheral side and a lens barrel holder that has a tubular holding portion that holds the lens barrel from the outer peripheral side. Can be a part of the holding portion. In this way, the fixed region of the weight is provided in the holding portion located on the outer peripheral side of the lens barrel that holds the optical element on the inner peripheral side. As a result, the weight increases in the radial direction, so that a resin or a metal having a relatively small specific gravity can be used in order to secure the weight of the weight.

In the present invention, in order to swing the rocking body, a swinging magnetic drive mechanism for swinging the rocking body and a fixed body that supports the rocking body via the support body are provided, and the rocking body is supported. The dynamic magnetic drive mechanism includes a coil fixed to one of the rocking body and the fixed body, and a magnet fixed to the other and facing the coil in the radial direction, and the magnet is 2 in the axial direction. It is desirable that the magnet is polarized and magnetized.

Further, in the present invention, it is desirable that the rocking magnetic drive mechanism includes a Hall element attached to the side of the rocking body and the support on which the coil is fixed and facing the magnet. In this way, it is possible to detect that the rocking body is in the reference posture based on the output from the Hall element. Further, in this way, the inclination angle at which the rocking body is inclined with respect to the axis can be detected based on the output from the Hall element.

According to the present invention, when one weight is attached to the rocking body, the center of gravity of the rocking body can be adjusted in the axial direction by moving the fixed position in the axial direction.

It is a perspective view of the optical unit to which this invention was applied seen from the subject side. It is sectional drawing of the optical unit in line AA of FIG. FIG. 5 is an exploded perspective view of the optical unit of FIG. 1 as viewed from the subject side. It is an exploded perspective view which looked at the 1st unit from the subject side. It is an exploded perspective view which looked at the 1st unit from the anti-subject side. It is a perspective view which looked at the movable body from the subject side. It is a perspective view which looked at the movable body from the subject side and the anti-subject side. It is sectional drawing which cut | cut the optical unit in the plane orthogonal to the axis. It is a perspective view which looked at the 2nd unit from the subject side and the anti-subject side. It is sectional drawing of the 2nd unit in line BB of FIG. It is an exploded perspective view which looked at the 2nd unit from the subject side. It is an exploded perspective view which looked at the 2nd unit from the anti-subject side. It is an exploded perspective view which looked at the fixing member from the subject side. It is explanatory drawing of the angle position return mechanism. It is explanatory drawing of the center of gravity adjustment method of a movable unit. It is a flowchart of the center of gravity adjustment method of a movable unit. It is explanatory drawing of the position adjustment mechanism of the modification 1. FIG. It is explanatory drawing of the position adjustment mechanism of the modification 2. It is explanatory drawing of another example of the method of adjusting the center of gravity of a movable unit. It is a flowchart of another example of the method of adjusting the center of gravity of a movable unit.

Hereinafter, embodiments of an optical unit to which the present invention is applied will be described with reference to the drawings. In the present specification, the three axes of XYZ are directions orthogonal to each other, one side in the X-axis direction is indicated by + X, the other side is indicated by −X, one side in the Y-axis direction is indicated by + Y, and the other side is indicated by −Y. , One side in the Z-axis direction is indicated by + Z, and the other side is indicated by −Z. The Z-axis direction is the axial direction of the optical unit and is the optical axis direction of the optical element. The + Z direction is the subject side of the optical unit, and the −Z direction is the anti-subject side (image side) of the optical unit.

(overall structure)
FIG. 1 is a perspective view of an optical unit to which the present invention is applied as viewed from the subject side. FIG. 2 is a cross-sectional view of the optical unit taken along the line AA of FIG. FIG. 3 is an exploded perspective view of the optical unit of FIG. 1 when viewed from the subject side. The optical unit 1 shown in FIG. 1 is used, for example, in an optical device such as a mobile phone with a camera or a drive recorder, or an optical device such as an action camera or a wearable camera mounted on a moving body such as a helmet, a bicycle, or a radiocon helicopter. .. In such an optical device, if the optical device shakes during shooting, the captured image is distorted. The optical unit 1 of this example is an optical unit with a shake correction function that corrects the tilt and rotation of the mounted optical module 2 in order to avoid distortion of the captured image.

As shown in FIGS. 2 and 3, the optical unit 1 includes a first unit 3 having an optical module 2 and a second unit 4 that rotatably supports the first unit 3 from the side in the −Z direction.

As shown in FIG. 2, the first unit 3 includes a movable unit (oscillating body) 5 including an optical module 2, an oscillating support mechanism 6 for swingably supporting the movable unit 5, and a oscillating support mechanism 6. A holder 7 (support body) that supports the movable unit 5 via the movable unit 5 and a case body 8 that surrounds the movable unit 5 and the holder 7 from the outer peripheral side are provided. The optical module 2 includes an optical element 9 and an image pickup element 10 arranged on the optical axis of the optical element 9. The rocking support mechanism 6 allows the movable unit 5 to swing between a reference posture in which the predetermined axis L and the optical axis of the optical element 9 coincide with each other and an inclined posture in which the optical axis is tilted with respect to the axis L. To support. The swing support mechanism 6 is a gimbal mechanism. Here, the axis L coincides with the Z axis.

Further, the first unit 3 includes a swinging magnetic drive mechanism 11 for swinging the movable unit 5, and a posture returning mechanism 12 for returning the swinging movable unit 5 to the reference posture. The rocking magnetic drive mechanism 11 includes a rocking drive coil 13 held by the movable unit 5 and a rocking drive magnet 14 held by the case body 8. The rocking drive coil 13 and the rocking drive magnet 14 face each other in the radial direction orthogonal to the axis L. The posture return mechanism 12 includes a posture return magnetic member 15 that is held by the movable unit 5 and faces the swing drive magnet 14.

Further, the first unit 3 includes a swing stopper mechanism 17 that regulates the swing range of the movable unit 5. Further, the first unit 3 includes a flexible printed circuit board 18 electrically connected to the swing drive coil 13 and a flexible printed circuit board 19 electrically connected to the image pickup element 10.

Next, the second unit 4 includes a rotation support mechanism 21 that rotatably supports the holder 7 around the axis L, and a fixing member 22 that supports the holder 7 via the rotation support mechanism 21. The rotation support mechanism 21 includes a rotation pedestal 24 and a bearing mechanism 25. The rotary pedestal 24 is rotatably supported by the fixing member 22 via a bearing mechanism 25. The bearing mechanism 25 includes a first ball bearing 27 and a second ball bearing 28 arranged in the Z-axis direction. The first ball bearing 27 is located in the + Z direction of the second ball bearing 28.

Further, the second unit 4 includes a rolling magnetic drive mechanism 31 for rotating the rotary pedestal 24 and an angle position return mechanism 32 for returning the rotated rotary pedestal 24 to a predetermined reference angle position. The rolling magnetic drive mechanism 31 includes a rolling drive coil 35 held by the rotary pedestal 24 and a rolling drive magnet 36 held by the fixing member 22. The rolling drive coil 35 and the rolling drive magnet 36 face each other in the Z-axis direction. The angle position return mechanism 32 includes an angle position return magnetic member 37 fixed to the rotary pedestal 24. The magnetic member 37 for returning the angle position overlaps with the rolling drive magnet 36 when viewed from the Z-axis direction. Further, the second unit 4 includes a rotation stopper mechanism 38 (rotation angle range regulation mechanism) that regulates the rotation angle range of the rotation pedestal 24. Further, the second unit 4 includes a flexible printed circuit board 39 electrically connected to the rolling drive coil 35 and a cover member 40 fixed to the fixing member 22.

Here, the holder 7 of the first unit 3 is attached to the rotary pedestal 24. Therefore, when the rotary pedestal 24 rotates, the movable unit 5 and the holder 7 of the first unit 3 rotate around the Z axis (axis L around) integrally with the rotary pedestal 24. Therefore, the movable unit 5 and the holder 7 of the first unit 3 and the rotating pedestal 24 of the second unit 4 form a movable body 41 that rotates integrally around the Z axis. On the other hand, the case body 8 of the first unit 3 is attached to the fixing member 22. As a result, the fixing member 22 and the case body 8 form a fixing body 42 that rotatably supports the movable body 41. The rotary pedestal 24 constitutes the rotary support mechanism 21 and also constitutes the movable body 41.

(1st unit)
As shown in FIG. 3, the case body 8 is assembled with a tubular case 45 having a substantially octagonal outer shape when viewed from the Z-axis direction and from the + Z direction side (subject side) with respect to the tubular case 45. A subject-side case 46 is provided. The tubular case 45 is made of a magnetic material. The subject side case 46 is formed of a resin material.

The tubular case 45 includes a substantially octagonal tubular body portion 47 and a frame-shaped end plate portion 48 projecting inward from the end portion of the body portion 47 in the + Z direction. A substantially octagonal opening 49 is formed in the center of the end plate portion 48. The body portion 47 is provided at four corner portions, which are side plates 51 and 52 facing in the X-axis direction, side plates 53 and 54 facing in the Y-axis direction, and inclined by 45 degrees with respect to the X-axis direction and the Y-axis direction. The side plate 55 is provided. A swing driving magnet 14 is fixed to the inner peripheral surfaces of the side plates 51 and 52 facing in the X-axis direction and the side plates 53 and 54 facing in the Y-axis direction, respectively. Each rocking drive magnet 14 is polarized and magnetized in the Z-axis direction. The magnetizing polarization line 14a of each swing driving magnet 14 extends in the circumferential direction in a direction orthogonal to the Z axis (axis line L).

Further, the tubular case 45 is provided with positioning notches 56 at the lower end edge portion in the + X direction, the lower end edge portion in the + Y direction, and the lower end edge portion in the −Y direction, respectively. Further, the body portion 47 is provided with a rectangular notch portion 57 for routing the flexible printed circuit boards 18 and 19 at the lower end edge portion in the −X direction.

The subject-side case 46 includes a tubular body portion 58 that abuts on the end plate portion 48 of the tubular case 45, and an end plate portion 59 that projects inward from the + Z direction end portion of the body portion 58. A circular opening 60 is formed in the center of the end plate portion 59. The end portion of the optical module 2 in the + Z direction is inserted into the circular opening 60.

(holder)
FIG. 4 is an exploded perspective view of the movable unit 5 and the holder 7 when viewed from the + Z direction side. FIG. 5 is an exploded perspective view of the movable unit 5 and the holder 7 when viewed from the side in the −Z direction. As shown in FIG. 4, the holder 7 includes a holder annular portion 62 into which an end portion of the movable unit 5 in the + Z direction is inserted, and a holder body portion 63 continuous in the −Z direction side of the holder annular portion 62. The holder body portion 63 includes four window portions 64 arranged in the circumferential direction and four vertical frame portions 65 for partitioning the window portions 64 adjacent to each other in the circumferential direction. Two of the four window portions 64 open in the X-axis direction, and the other two open in the Y-axis direction. The four vertical frame portions 65 are arranged at angular positions between the X-axis direction and the Y-axis direction, respectively.

The holder body 63 is provided with positioning notches 67 at the lower end edge portion in the + X direction, the lower end edge portion in the + Y direction, and the lower end edge portion in the −Y direction, respectively. Further, the holder body portion 63 is provided with a rectangular notch portion 68 for routing the flexible printed substrates 18 and 19 at the lower end edge portion in the −X direction.

(Movable unit)
FIG. 6 is a perspective view of the movable unit 5 when viewed from the + Z direction side (subject side). FIG. 7A is a perspective view when the movable unit 5 is viewed from the + Z direction side (subject side), and FIG. 7B is a perspective view when the movable unit 5 is viewed from the −Z direction. .. As shown in FIGS. 6 and 7, the movable unit 5 includes an optical module 2 and an optical module holder 71 (lens barrel holder) that holds the optical module 2 from the outer peripheral side. The optical module 2 includes a lens barrel portion 72 that holds the optical element 9 on the inner peripheral side, and a square tubular portion 74 that holds the substrate 73 on the inner peripheral side at the end portion of the lens barrel portion 72 in the −Z direction. The image sensor 10 is mounted on the substrate 73. A male screw portion 75 is provided on the outer peripheral surface of the end portion of the lens barrel portion 72 (cylinder portion) in the + Z direction in a region (outer peripheral surface portion) having a constant width in the Z-axis direction.

A weight 77 for adjusting the position of the center of gravity of the movable unit 5 is attached to the male screw portion 75. The weight 77 has an annular shape, and has a female screw portion 77a that can be screwed with the male screw portion 75 on the inner peripheral surface. Here, the male screw portion 75 is a fixing region for fixing the weight. By rotating the weight 77 around the Z axis, the position of the weight 77 is moved in the Z axis direction within the fixed region, and the position of the center of gravity of the movable unit 5 is adjusted in the Z axis direction. The male screw portion 75 and the female screw portion 77a are position adjusting mechanisms 78 that move the fixed position of the weight 77 fixed to the movable unit 5 in the axial direction.

As shown in FIG. 6, the optical module holder 71 rises in the + Z direction and extends in the Y-axis direction at both ends of the substantially octagonal bottom plate portion 80 and the bottom plate portion 80 in the X-axis direction when viewed from the Z-axis direction. A pair of wall portions 81 and 82 and a pair of wall portions 83 and 84 rising in the + Z direction and extending in the X-axis direction at both ends of the bottom plate portion 80 in the Y-axis direction are provided. Further, the optical module holder 71 includes an optical module holding portion 85 (holding portion) provided at the center of the bottom plate portion 80. The optical module holding portion 85 has a tubular shape and is coaxial with the axis L. The lens barrel portion 72 of the optical module 2 is inserted into the optical module holding portion 85. The optical module holding portion 85 holds the lens barrel portion 72 from the outer peripheral side. Two oscillating stopper convex portions 87 projecting in the + Z direction are provided on the end faces of the wall portions 81, 82, 83, 84 in the + Z direction. The two oscillating stopper convex portions 87 project from both end portions in the circumferential direction of the wall portions 81, 82, 83, 84, respectively.

A coil fixing portion 88 is provided on the outer surface of each of the wall portions 81, 82, 83, 84 facing outward in the radial direction. The swing drive coil 13 is fixed to each coil fixing portion 88 in a posture in which the center hole is directed outward in the radial direction. Further, a Hall element fixing portion 89 is provided in the coil fixing portion 88 of the wall portion 82 located on the −X direction side and the wall portion 83 located on the + Y direction side. The Hall element 90 is fixed to the Hall element fixing portion 89. The Hall element 90 is located at the center of each swing drive coil 13 in the Z-axis direction. The Hall element 90 is electrically connected to the flexible printed circuit board 18.

A magnetic member fixing region 92 for fixing the posture returning magnetic member 15 is provided on the inner side surface of each of the wall portions 81, 82, 83, 84 facing inward in the radial direction. The magnetic member fixing region 92 is a groove 93 extending in the Z-axis direction with a constant width on the inner surface. The attitude return magnetic member 15 has a rectangular plate shape, and the dimension in the Z-axis direction is longer than the dimension in the circumferential direction. Further, the dimension of the magnetic member 15 for returning to the posture in the Z-axis direction is shorter than the dimension of the groove 93 in the Z-axis direction. The posture returning magnetic member 15 is fixed in the groove 93 in a posture in which the longitudinal direction is oriented in the Z-axis direction. Here, in the posture returning magnetic member 15, when the movable unit 5 is viewed from the radial direction in the reference posture, the center of the posture returning magnetic member 15 is the magnetizing polarization line 14a of the swing driving magnet 14. After the fixing position is adjusted in the Z direction in the groove 93 so as to overlap, the fixing position is fixed in the groove 93 by the adhesive.

(Swing support mechanism)
FIG. 8 is a cross-sectional view of the optical unit 1 cut along a plane passing through the swing support mechanism 6 orthogonal to the Z axis (axis line L). The rocking support mechanism 6 is configured between the optical module holder 71 and the holder 7. As shown in FIG. 8, the rocking support mechanism 6 includes two first rocking support portions 101 provided at diagonal positions on the first axis R1 of the optical module holder 71, and a third holder body 63. It includes two second swing support portions 102 provided at diagonal positions on the two axes R2, and a movable frame 103 supported by the first swing support portion 101 and the second swing support portion 102. .. Here, the first axis R1 and the second axis R2 are orthogonal to the Z-axis direction and are inclined by 45 degrees with respect to the X-axis direction and the Y-axis direction. Therefore, the first rocking support portion 101 and the second rocking support portion 102 are arranged at an angular position between the X-axis direction and the Y-axis direction. As shown in FIGS. 4 and 5, the second swing support portion 102 is a recess formed on the inner side surface of the holder body portion 63.

As shown in FIG. 8, the movable frame 103 is a plate-shaped spring having a substantially octagonal planar shape when viewed from the Z-axis direction. Metal spheres 104 are fixed to the outer surface of the movable frame 103 at four locations around the Z axis by welding or the like. The sphere 104 makes point contact with the contact spring 105 held by the first swing support portion 101 provided on the optical module holder 71 and the second swing support portion 102 provided on the holder body 63. As shown in FIGS. 4 and 5, the contact spring 105 is a plate-shaped spring, and the contact spring 105 held by the first swing support portion 101 is elastically deformable in the first axis R1 direction and has a second swing. The contact spring 105 held by the dynamic support portion 102 is elastically deformable in the second axis R2 direction. Therefore, the movable frame 103 is supported in a state of being rotatable in each of the two directions (the first axis R1 direction and the second axis R2 direction) orthogonal to the Z axis direction.

(Magnetic drive mechanism for rocking)
As shown in FIG. 8, the swing magnetic drive mechanism 11 includes a first swing magnetic drive mechanism 11A and a second swing magnetic drive mechanism 11B provided between the movable unit 5 and the tubular case 45. The first swing magnetic drive mechanism 11A includes two sets including a swing drive magnet 14 and a swing drive coil 13 facing each other in the X-axis direction. Further, the first swing magnetic drive mechanism 11A includes a Hall element 90 arranged inside a set of swing drive coils 13 on the side in the −X direction. The second swing magnetic drive mechanism 11B includes two sets including a swing drive magnet 14 and a swing drive coil 13 facing each other in the Y-axis direction. Further, the second swing magnetic drive mechanism 11B includes a Hall element 90 arranged inside a set of swing drive coils 13 on the + Y direction side.

Each swing driving coil 13 is held on the outer surfaces of the wall portions 81 and 82 on both sides of the optical module holder 71 in the X-axis direction and the wall portions 83 and 84 on both sides in the Y-axis direction. The rocking drive magnet 14 is held on the inner side surfaces of the side plates 51, 52, 53, 54 provided in the tubular case 45 of the tubular case 45. As shown in FIGS. 2 and 3, each swing driving magnet 14 is divided into two in the Z-axis direction, and the magnetic poles on the inner surface side are magnetized differently with the polarization polarization line 14a as a boundary. In the swing drive coil 13, the long side portions on the + Z direction side and the −Z direction side are used as effective sides. When the movable unit 5 is in the reference posture, each Hall element 90 faces the magnetizing polarization line 14a of the swing driving magnet 14 located on the outer peripheral side. Here, since the tubular case 45 is made of a magnetic material, it functions as a yoke for the swing driving magnet 14.

The two sets of the second swing magnetic drive mechanism 11B located on the + Y direction side and the −Y direction side of the movable unit 5 generate a magnetic drive force in the same direction around the X axis when the swing drive coil 13 is energized. The wiring is connected so as to do. Further, the two sets of the first swing magnetic drive mechanism 11A located on the + X direction side and the −X direction side of the movable unit 5 have a magnetic drive force in the same direction around the Y axis when the swing drive coil 13 is energized. Is connected by wiring so that The rocking magnetic drive mechanism 11 first sets the optical module 2 by combining the rotation around the X axis by the second rocking magnetic drive mechanism 11B and the rotation around the Y axis by the first rocking magnetic drive mechanism 11A. Rotate around the axis R1 and around the second axis R2. When performing runout correction around the X axis and runout correction around the Y axis, the rotation around the first axis R1 and the rotation around the second axis R2 are combined.

(Swing stopper mechanism)
As shown in FIG. 2, the swing stopper mechanism 17 that regulates the swing range of the movable unit 5 includes a swing stopper convex portion 87 provided on the movable unit 5 (optical module holder 71) and a holder annular portion 62. It is composed of and. When the movable unit 5 is in an inclined posture exceeding a predetermined swing range, the swing stopper convex portion 87 abuts on the holder annular portion 62, and further restricts the movable unit 5 from tilting. Further, in the swing stopper mechanism 17, when the movable unit 5 moves in the + Z direction due to an external force, the swing stopper convex portion 87 abuts on the holder annular portion 62, and the movable unit 5 further moves in the + Z direction. Regulate movement.

(Attitude return mechanism)
The posture return mechanism 12 includes a posture return magnetic member 15 and a swing drive magnet 14. As shown in FIG. 2, the attitude return magnetic member 15 is arranged on the side opposite to the swing drive magnet 14 with the swing drive coil 13 sandwiched in the radial direction. When the state of the holder 7 in the reference posture is viewed from the radial direction, the center of the posture returning magnetic member 15 is located at a position overlapping with the polarization line 14a of the swing driving magnet 14 located on the outer peripheral side. In other words, when the movable unit 5 is in the reference posture, the virtual surface 12a including the polarization line 14a and orthogonal to the axis L passes through the center of the posture return magnetic member 15.

Here, when the movable unit 5 is tilted from the reference posture (when the optical axis of the optical module 2 is tilted with respect to the axis L), the center of the posture returning magnetic member 15 is the polarization line of the swing driving magnet 14. It deviates from 14a in the Z-axis direction. As a result, between the attitude return magnetic member 15 and the swing drive magnet 14, the center of the posture return magnetic member 15 is directed to the side where the polarization line 14a of the swing drive magnet 14 is located. Magnetic attraction works in the direction of That is, when the movable unit 5 is tilted from the reference posture, a magnetic attraction force in the direction of returning the movable unit 5 to the reference posture acts between the posture returning magnetic member 15 and the swing driving magnet 14. Therefore, the posture returning magnetic member 15 and the swing driving magnet 14 function as a posture returning mechanism for returning the movable unit 5 to the reference posture.

(2nd unit)
FIG. 9A is a perspective view of the second unit 4 when viewed from the + Z direction side, and FIG. 9B is a perspective view of the second unit 4 when viewed from the −Z direction side. .. FIG. 10 is a cross-sectional view of the second unit 4. FIG. 11 is an exploded perspective view of the second unit 4 when viewed from the + Z direction side (subject side). FIG. 12 is an exploded perspective view of the second unit 4 when viewed from the side in the −Z direction (anti-subject side). FIG. 13 is an exploded perspective view of the fixing member 22, the rolling drive magnet 36, and the yoke 120. As shown in FIGS. 9 and 10, the second unit 4 includes a rotation support mechanism 21 that rotatably supports the holder 7 around the axis L, and a fixing member 22 that supports the holder 7 via the rotation support mechanism 21. , A flexible printed circuit board 39 and a cover member 40. The rotation support mechanism 21 includes a rotation pedestal 24 and a bearing mechanism 25 (first ball bearing 27 and second ball bearing 28).

As shown in FIG. 11, the fixing member 22 has a flat shape thin in the Z-axis direction. The fixing member 22 is provided with a rectangular notch 112 at the edge portion in the −X direction. The fixing member 22 is provided with a step portion 113 on an outer peripheral edge portion excluding the notch portion 112. The step portion 113 is provided with three protrusions 114 that project in each of the + X direction, the + Y direction, and the −Y direction.

As shown in FIGS. 11 and 12, the fixing member 22 includes a tubular portion 115 projecting in the + Z direction and the −Z direction at the central portion in the Y-axis direction. The center hole 116 of the tubular portion 115 penetrates the fixing member 22 in the Z-axis direction. As shown in FIG. 10, the first ball bearing 27 and the second ball bearing 28 are held on the inner peripheral side of the tubular portion 115. In other words, the tubular portion 115 holds the outer ring of the first ball bearing 27 and the outer ring of the second ball bearing 28 from the outer peripheral side.

Further, as shown in FIG. 11, the fixing member 22 is provided with a pair of rolling drive magnet holding recesses 117 on the end faces in the + Z direction. A pair of rolling drive magnet holding recesses 117 are provided on both sides of the tubular portion 115. A rolling drive magnet 36 is inserted and fixed in each rolling drive magnet holding recess 117. Each rolling drive magnet 36 is protected from the outer peripheral side by a fixing member 22. Here, the rolling drive magnet 36 is polarized and magnetized in the circumferential direction. The magnetizing polarization line 36a of each rolling drive magnet 36 extends radially through the center of the rolling drive magnet 36 in the circumferential direction. Further, the fixing member 22 is provided with a rotation stopper convex portion 118 projecting in the + Z direction at a position separated from the tubular portion 115 in the + X direction.

Further, as shown in FIG. 12, the fixing member 22 is provided with a yoke holding recess 121 on the end face in the −Z direction. The yoke holding recess 121 is provided so as to surround the tubular portion 115. The yoke holding recess 121 extends in the Y-axis direction and includes an overlapping portion that overlaps the pair of rolling drive magnet holding recesses 117 when viewed from the Z-axis direction. As shown in FIG. 13, the overlapping portion is a rectangular communication portion 122 that communicates the rolling drive magnet holding recess 117 and the yoke holding recess 121 in the Z-axis direction. The yoke 120 is inserted into the yoke holding recess 121 from the −Z direction. The yoke 120 is made of a magnetic material. The yoke 120 abuts on the rolling drive magnet 36 held in the rolling drive magnet holding recess 117 from the −Z direction via the communication portion 122.

Further, as shown in FIG. 12, the fixing member 22 includes four cover member fixing protrusions 123 protruding in the −Z direction on the outer peripheral side of the yoke holding recess 121. Two of the four cover member fixing convex portions 123 are provided on both sides of the fixing member 22 at the end edge portion in the + Y direction with the yoke holding concave portion 121 sandwiched in the X-axis direction. The other two of the four cover member fixing protrusions 123 are provided on both sides of the fixing member 22 at the end edge portion in the −Y direction with the yoke holding recess 121 sandwiched in the X-axis direction. There is. The cover member 40 is fixed to the four cover member fixing convex portions 123 from the −Z direction. The cover member 40 covers the yoke 120 from the −Z direction. A circular opening 40a is provided at the center of the cover member 40. As shown in FIG. 9B, when the cover member 40 is fixed to the fixing member 22, the tip of the shaft portion 132 is inserted into the opening 40a.

Next, as shown in FIG. 12, the rotary pedestal 24 includes a flat pedestal body 131 having a thin Z-axis direction and a shaft portion 132 protruding from the pedestal body 131 in the −Z direction. As shown in FIG. 10, the shaft portion 132 is inserted into the first ball bearing 27 and the second ball bearing 28 held by the tubular portion 115 of the fixing member 22. That is, the shaft portion 132 is held from the outer peripheral side by the inner ring of the first ball bearing 27 and the inner ring of the second ball bearing 28. The shaft portion 132 penetrates the first ball bearing 27 and the second ball bearing 28, and the tip portion thereof protrudes from the second ball bearing 28 in the −Z direction. A spring washer 134 is inserted into the tip portion of the shaft portion 132. An annular member 135 is fixed to the tip of the shaft portion 132 by welding or the like. Here, the spring washer 134 is compressed between the inner ring of the second ball bearing 28 and the annular member 135, and pressurizes the first ball bearing 27 and the second ball bearing 28.

As shown in FIG. 12, a pair of coil fixing portions 138 are provided on both sides of the pedestal body 131 facing the fixing member 22 with the shaft portion 132 sandwiched between them. The rolling drive coil 35 is held in the pair of coil fixing portions 138 in a posture in which the center hole is oriented in the Z-axis direction. The Hall element 140 is fixed inside the rolling drive coil 35 fixed to one of the coil fixing portions 138. The Hall element 140 is located at the center of the rolling drive coil 35 in the circumferential direction. The Hall element 140 is electrically connected to a flexible printed circuit board 39 that is electrically connected to the rolling drive coil 35.

As shown in FIG. 11, on the end face of the pedestal body 131 on the + Z direction side, the end face is offset inward by a certain width from the outer peripheral edge, and the end face is on the + X direction side and in the Y-axis direction. A substantially U-shaped peripheral wall 142 surrounding from both sides is provided. The peripheral wall 142 is provided with three protrusions 143 that project in each of the + X direction, the + Y direction, and the −Y direction.

Further, on the end surface of the pedestal body 131 on the + Z direction side, magnetic member fixing regions 144 for fixing the magnetic member 37 for returning the angle position are provided on both sides in the Y-axis direction with the tubular portion 115 sandwiched between them. ing. The magnetic member fixing region 144 is a groove 145 having a constant width and extending parallel to the X-axis direction. The magnetic member 37 for returning the angle position has a square pillar shape, and the dimension in the circumferential direction (X-axis direction) is longer than the dimension in the radial direction. Further, the dimension of the magnetic member 37 for returning the angle position in the circumferential direction (X-axis direction) is shorter than the dimension in the circumferential direction (X-axis direction) of the groove 145.

The magnetic member 37 for returning the angle position is fixed in the groove 145 (inside the magnetic member fixing region 144) in a posture in which the longitudinal direction is directed in the circumferential direction. When the posture returning magnetic member 15 is viewed from the Z-axis direction when the rotary pedestal 24 is in a predetermined reference angle position, the center of the angle position returning magnetic member 37 is the magnetizing polarization of the rolling drive magnet 36. Its fixing position is adjusted in the groove 145 so as to overlap the wire 36a, and then fixed in the groove 145 by an adhesive.

Here, the pedestal body 131 is provided with an opening 146 at a position different from the magnetic member fixing region 144 in the circumferential direction. In this example, the opening 146 is provided at a position separated from the shaft portion 132 in the + X direction.

(Magnetic drive mechanism for rolling)
As shown in FIGS. 9 and 10, when the rotary pedestal 24 is held by the fixing member 22 via the first ball bearing 27 and the second ball bearing 28, the rolling magnetic drive mechanism 31 is configured. As shown in FIG. 10, the rolling magnetic drive mechanism 31 includes a pair of rolling magnetic drive mechanisms 31 held on both sides of the rotating pedestal 24 with the shaft portion 132 sandwiched between them. Each rolling magnetic drive mechanism 31 has a rolling drive coil 35 held by a rotary pedestal 24 and a rolling drive magnet 36 held by a fixing member 22 and facing each rolling drive coil 35 in the Z-axis direction. Be prepared. The rolling drive magnet 36 is divided into two in the circumferential direction, and the magnetic poles on the surface facing the rolling drive coil 35 are magnetized so as to be different with the polarization line 36a as a boundary. The rolling drive coil 35 is an air-core coil, and a long side portion extending in the radial direction is used as an effective side. The Hall element 140 faces the magnetizing polarization line 36a of the swing driving magnet 14 located in the −Z direction when the rotary pedestal 24 is at a predetermined reference angle position.

(Rotating stopper mechanism)
Further, when the rotary pedestal 24 is held by the fixing member 22 via the first ball bearing 27 and the second ball bearing 28, as shown in FIG. 9A, the rotary stopper convex portion 118 of the fixing member 22 is formed. It is inserted into the opening 146 of the rotary pedestal 24. As a result, the rotation stopper convex portion 118 of the fixing member 22 and the opening 146 of the rotation pedestal 24 form a rotation stopper mechanism 38 that regulates the rotation angle range around the Z axis of the rotation pedestal 24. That is, the rotary pedestal 24 rotates around the Z axis within a range in which the convex portion 118 for the rotation stopper does not interfere with the inner peripheral wall (contact portion) of the opening 146. In other words, the rotation stopper mechanism 38 regulates the rotation angle range of the rotation pedestal 24 by abutting the inner peripheral wall of the opening 146 from the circumferential direction with the rotation stopper convex portion 118.

(Angle position return mechanism)
FIG. 14 is an explanatory view of the angle position return mechanism 32. As shown in FIG. 14, the angle position return mechanism 32 includes an angle position return magnetic member 37 and a rolling drive magnet 36. As shown in FIG. 10, the angle position return magnetic member 37 is arranged on the side opposite to the rolling drive magnet 36 with the rolling drive coil 35 sandwiched in the Z-axis direction. Further, as shown in FIG. 14A, the state in which the rotary pedestal 24 is rotatably supported by the fixing member 22 via the bearing mechanism 25 and the rotary pedestal 24 is in the reference angle position is the Z axis. When viewed from the direction, the center 37a of the magnetic member 37 for returning to the angular position is located at a position overlapping the magnetizing polarization line 36a of the rolling drive magnet 36 located in the −Z direction. In other words, when the rotary pedestal 24 is in the reference angle position, the virtual surface 32a including the polarization line 36a and parallel to the axis L passes through the center 37a of the magnetic member 37 for returning the angle position.

Next, as shown in FIGS. 14 (b) and 14 (c), when the rotary pedestal 24 rotates in the CW direction or the CCW direction from the reference rotation position, the center 37a of the magnetic member 37 for returning the angle position is driven by rolling. It deviates from the magnetizing polarization line 36a of the magnet 36 in the circumferential direction. As a result, between the magnetic member 37 for returning the angle position and the magnet 36 for rolling drive, the center 37a of the magnetic member 37 for returning the angle position faces the side where the polarization line 36a of the rolling drive magnet 36 is located. The magnetic attraction force in the direction of bending works. That is, when the rotary pedestal 24 rotates from the reference angle position, a magnetic attraction force in the direction of returning the rotary pedestal 24 to the reference angle position acts between the magnetic member 37 for returning the angle position and the magnet 36 for rolling drive. Therefore, the magnetic member 37 for returning the angle position and the magnet 36 for driving the rolling function function as an angle position returning mechanism 32 for returning the rotary pedestal 24 to the reference angle position.

In the state shown in FIG. 14B, the inner peripheral wall of the opening 146 of the rotary pedestal 24 abuts on the rotary stopper convex portion 118 of the fixing member 22 from one side in the circumferential direction. Is restricted from rotating in the CW direction. Further, in the state shown in FIG. 14C, the inner peripheral wall of the opening 146 of the rotary pedestal 24 abuts on the rotary stopper convex portion 118 of the fixing member 22 from the other side in the circumferential direction, and the rotary pedestal 24 is further abutted. Is restricted from rotating in the CCW direction. Therefore, the rotary pedestal 24 rotates in an angular range from the angular position shown in FIG. 14 (b) to the angular position shown in FIG. 14 (c).

Here, as shown in FIGS. 14A to 14C, while the rotary pedestal 24 rotates in a predetermined angle range, the angle position return magnetic member 37 magnetizes the rolling drive magnet 36. It overlaps with the virtual surface 32a including the polarization line 36a and extends toward the rolling drive coil 35, so that the magnetic member 37 for returning the angle position does not come off from the virtual surface 32a. Therefore, according to the angle position return mechanism 32, it is possible to reliably generate a magnetic attraction force in the direction of returning the center 37a of the angle position return magnetic member 37 to the position where it overlaps with the magnetizing polarization line 36a. Therefore, the rotated movable unit 5 can be reliably returned to the reference angle position.

(Installation of the 1st unit to the 2nd unit)
Here, when the first unit 3 is attached to the second unit 4, the peripheral wall 142 of the second unit 4 is inserted into the lower end portion of the holder body 63 of the holder 7, and the positioning provided on the holder body 63 is provided. A protrusion 143 protruding from the peripheral wall 142 of the second unit 4 is inserted into the notch 67. Therefore, the holder 7 is fixed to the rotary pedestal 24 in a state of being positioned in the radial direction and the circumferential direction. Further, when the first unit 3 is attached to the second unit 4, a portion on the + Z direction side of the step portion 113 of the outer peripheral edge of the fixing member 22 is inserted into the lower end portion of the tubular case 45, and the tubular case The protrusion 114 provided in the step portion 113 is inserted into the positioning notch portion 56 provided in the 45. Therefore, the case body 8 is fixed to the fixing member 22 in a state of being positioned in the radial direction and the circumferential direction to form the fixed body 42. As a result, the optical unit 1 is completed.

(Optical unit runout correction)
As described above, the optical unit 1 includes a swing magnetic drive mechanism 11 in which the first unit 3 performs runout correction around the X axis and runout correction around the Y axis. Therefore, it is possible to perform runout correction in the pitching (pitch) direction and the yawing (rolling) direction. Further, since the second unit 4 includes a rolling magnetic drive mechanism 31 that rotates the holder 7 of the first unit 3, the optical unit 1 can perform runout correction in the rolling direction. Here, since the optical unit 1 includes a gyroscope in the movable unit 5, the swing magnetic drive mechanism 11 and the rolling magnetism are detected so as to detect the runout around three axes orthogonal to each other by the gyroscope and cancel the detected runout. The drive mechanism 31 is driven.

The runout correction of the optical unit 1 can also be performed based on the output from the Hall element 90 and the output from the Hall element 140.

That is, since the Hall element 90 faces the polarization line 14a of the swing driving magnet 14 when the movable unit 5 is in the reference posture, the movable unit 5 is in the reference posture based on the output from the Hall element 90. And the angle at which the movable unit 5 is tilted with respect to the axis Z can be detected. Therefore, if the swing magnetic drive mechanism 11 is driven so as to cancel the inclination of the movable unit 5 and set the reference posture based on the output from the Hall element 90, the optical unit 1 swings around the X-axis and the Y-axis. Corrections can be made. Further, since the Hall element 140 faces the magnetizing polarization line 36a of the rolling drive magnet 36 in the Z-axis direction when the rotary pedestal 24 (movable body 41) is at the reference angle position, the output from the Hall element 140 Based on the above, it is possible to detect that the rotary pedestal 24 (movable body 41) is at the reference angle position and the rotation angle of the rotary pedestal 24 (movable body 41) from the reference angle position. Therefore, if the rolling magnetic drive mechanism 31 is driven so as to cancel the rotation of the rotary pedestal 24 (movable body 41) and set the reference angle position based on the output from the Hall element 140, the rotation of the optical unit 1 is rotated around the Z axis. Runout correction can be performed.

Further, the runout correction of the optical unit 1 may be performed based on the runout around the three axes detected by the gyroscope, the output from the Hall element 90, and the output from the Hall element 140. In this case, the gyroscope detects the runout around the three axes, drives the swing magnetic drive mechanism 11 and the rolling magnetic drive mechanism 31 so as to cancel the detected runout, and sets the movable unit 5 in the reference posture. When returning, the swing magnetic drive mechanism 11 is driven based on the output from the Hall element 90 so that the movable unit 5 is accurately in the reference posture. Further, when the rotary pedestal 24 (movable body 41) is returned to the reference angle position, the rolling magnetic drive mechanism 31 is driven based on the output from the Hall element 140, so that the rotary pedestal 24 (movable body 41) is accurate. It should be placed at the reference angle position.

(How to adjust the center of gravity of the movable unit)
FIG. 15 is an explanatory diagram of a method of adjusting the center of gravity of the movable unit 5 (oscillating body). FIG. 16 is a flowchart of a method of adjusting the center of gravity of the movable unit 5. As shown in FIG. 15, in this example, as a device for adjusting the center of gravity of the movable unit 5, a vibration generator 150 for vibrating the movable unit 5 in a direction orthogonal to the axis L and a flexible printed circuit board 18 are used. A detection unit 149 for detecting an output from the Hall element 90 via the Hall element 90 is provided. The vibration generator 150 includes a pedestal portion 150a to which the optical unit 1 is fixed and a drive portion 150b for vibrating the pedestal portion.

As shown in FIG. 16, when adjusting the center of gravity of the movable unit 5, the weight 77 is first attached to the male screw portion 75 (fixed area) of the movable unit 5 (optical module 2), and the optical unit 1 is vibrated. It is fixed to the pedestal portion 150a of the generator 150 (step ST1). The optical unit 1 is fixed to the pedestal portion 150a so that the axis L is perpendicular to the vibration direction of the pedestal portion 150a. After that, power is supplied to the Hall element 90, the output from the Hall element 90 is monitored by the detection unit 149 (step ST2), and a vibration operation (step ST3) of driving the vibration generator 150 to vibrate the pedestal unit 150a is performed. The moving operation (step ST4) in which the weight 77 is rotated around the axis L and moved in the male screw portion 75 is alternately repeated. The vibration operation is an external force applying operation that applies an external force to the optical unit 1 in a direction orthogonal to the axis L. Then, a time point when the output from the Hall element 90 becomes smaller than a predetermined threshold value is detected (step ST5), and the weight 77 is fixed at the position at that time point (step ST6).

Here, in a state where the swing center of the swing support mechanism 6 coincides with the center of gravity of the movable unit 5, the swing of the movable unit 5 is suppressed when an external force is applied. Therefore, when the swing center of the swing support mechanism 6 coincides with the center of gravity of the movable unit 5, the output (voltage signal amplitude) from the Hall element 90 becomes small. Therefore, if the weight 77 is fixed at a position where the output from the Hall element 90 becomes the smallest (a position smaller than a predetermined threshold value) when an external force is applied while changing the position of the weight 77, the swing support mechanism can be used. The swing center of 6 and the center of gravity of the movable unit 5 can be aligned.

According to this example, the center of gravity of the movable unit 5 can be adjusted by using the output from the Hall element 90 included in the swing support mechanism 6. Therefore, the device for adjusting the center of gravity of the movable unit 5 can be configured in a simple manner.

(Action effect)
In this example, the fixed position of the weight 77 attached to the movable unit 5 can be changed in the axis L direction at the male screw portion 75 (within the fixed region) provided on the movable unit 5. Therefore, when one weight 77 is attached to the optical module 2, the center of gravity of the movable unit 5 can be adjusted in the optical axis direction by adjusting the fixed position thereof in the male screw portion 75 in the optical axis direction.

Further, in this example, the weight 77 is moved in the optical axis direction by screwing the female screw portion 77a of the weight 77 and the male screw portion 75 of the lens barrel portion 72 of the movable unit 5 to rotate the weight 77. Therefore, it is easy to adjust the center of gravity. Further, by rotating the weight 77 around the optical axis, the position of the weight 77 in the optical axis direction can be finely adjusted.

(Modification example)
Here, the weight 77 can be provided with a locking portion that locks with a jig for rotating the weight 77. For example, when the weight 77 is attached to the optical module 2, the end surface of the weight 77, which is visible from the + Z direction, may be provided with a recess or a protrusion as a locking portion. Further, the weight 77 may be provided with a recess or a protrusion on the outer peripheral surface facing outward in the radial direction. In this way, the jig can be locked from the + Z direction to the concave or convex locking portion, and the weight 77 can be rotated around the axis L. Therefore, it becomes easy to adjust the center of gravity of the movable unit 5 by moving the position of the weight 77 in the axis L direction.

Further, as a position adjusting mechanism for moving the position of the weight 77 in the Z-axis direction within the fixed region, a configuration different from the above-mentioned position adjusting mechanism 78 can be adopted. FIG. 17 is an explanatory diagram of the position adjusting mechanism of the first modification. In FIG. 7 (a), the weight 77 is located in the fixed region on the + Z direction side, and in FIG. 7 (b), the weight 77 is located in the center of the fixed region in the Z-axis direction, and FIG. 7 (c). Then, the weight 77 is located on the −Z direction side in the fixed region. FIG. 18 is an explanatory diagram of the position adjusting mechanism of the modified example 2. Even when the position adjusting mechanisms of Modifications 1 and 2 are adopted, the parts other than the position adjusting mechanism are the same as those of the optical unit 1 described above. Therefore, in the description of the position adjusting mechanism of the modified examples 1 and 2, only the movable unit 5 and the weight 77 will be described, and the other description will be omitted.

As shown in FIG. 17, the position adjusting mechanism 78A of the modified example 1 includes three sets of stepped protrusions 151 provided on the outer peripheral surface 152 (fixed area 148) of the lens barrel portion 72. The three sets of stepped protrusions 151 are provided around the Z axis at an angular interval of 120 degrees. Each stepped protrusion 151 is formed by connecting three protrusions 153 provided at different positions in the circumferential direction and the axis L direction on the outer peripheral surface 152 (fixed region 148) of the lens barrel portion 72 in the circumferential direction. be. Further, the position adjusting mechanism 78A includes three projecting portions 155 (contact portions) projecting from the end edge of the annular weight 77 in the −Z direction in the −Z direction. The three protrusions 155 are provided around the Z axis at an angular interval of 120 degrees. The lens barrel portion 72 of the weight 77 is inserted into the center hole thereof. Each protrusion 155 can come into contact with each of the protrusions 153 of each set of stepped protrusions 151 from the + Z direction side.

When moving the fixed position of the weight 77 within the fixed area 148, as shown in FIGS. 17A to 17C, the weight 77 is inserted into the center hole of the weight 77 with the lens barrel 72 inserted. Rotate. Then, each protrusion 155 of the weight 77 is selectively brought into contact with one of the three protrusions 153 of the stepped protrusions 151 of each set. Here, by changing the protrusion 153 that brings the protruding portions 155 of the weight 77 into contact with each other, the weight 77 moves in the Z-axis direction by a predetermined amount, so that the center of gravity can be easily adjusted.

As shown in FIG. 18, the position adjusting mechanism 78B of the second modification has a fixed region 148 having a constant outer diameter in the Z-axis direction in a region having a constant width in the Z-axis direction of the outer peripheral surface 152 of the lens barrel portion 72. Be prepared. The weight 77 is annular, and its inner diameter dimension is substantially the same as the outer diameter dimension of the fixed region 148 (outer diameter dimension of the lens barrel portion 72). The lens barrel portion 72 of the weight 77 is press-fitted into the center hole thereof. When moving the fixed position of the weight 77 within the fixed area 148, the weight 77 mounted on the outer peripheral surface 152 of the lens barrel portion 72 is pushed by a jig or the like to move the weight 77 in the Z-axis direction. Even in this way, the fixed position of the weight 77 can be moved in the Z-axis direction within the fixed region 148.

(Another example of how to adjust the center of gravity of a movable unit)
Further, instead of monitoring the output from the Hall element 90, the inclination of the movable unit 5 may be monitored by using a measuring instrument to adjust the position of the center of gravity of the movable unit 5. FIG. 19 is an explanatory diagram of a method of adjusting the center of gravity when monitoring the inclination of the movable unit 5. FIG. 20 is a flowchart of a method of adjusting the center of gravity when monitoring the inclination of the movable unit 5. As the measuring instrument 161 for monitoring the inclination of the movable unit 5, for example, a laser displacement meter can be used. Further, in this example, as a device for adjusting the center of gravity of the movable unit 5, a centrifugal force generator 160 including a pedestal portion 160a and a driving portion 160b for rotating the pedestal portion 160a around a predetermined rotation axis L1 is used. be able to. As shown in FIG. 19, the measuring instrument 161 is installed at a position where the movable unit 5 of the optical unit 1 fixed to the pedestal portion 160a can be irradiated with the measuring light (laser light) parallel to the rotating shaft L1.

As shown in FIG. 20, when adjusting the center of gravity of the movable unit 5, first, the weight 77 is attached to the male screw portion 75 of the movable unit 5 (optical module 2), and the optical unit 1 is attached to the centrifugal force generator 160. It is fixed to the pedestal portion 160a of the above (step ST11). The optical unit 1 is fixed to the pedestal portion 160a so that the axis L is parallel to the axis of the pedestal portion 160a. After that, the measuring device 161 irradiates the measuring light to monitor the angle of the movable unit 5 with respect to the axis L (step ST12), and the centrifugal force generator 160 is driven to rotate the pedestal portion 160a (step ST13). ) And the moving operation (step ST14) of rotating the weight 77 around the axis L and moving it in the male screw portion 75 are alternately repeated. The rotation operation is an external force applying operation that applies an external force to the optical unit 1 in a direction orthogonal to the axis L. Then, a time point at which the angle at which the movable unit 5 is tilted with respect to the axis L becomes smaller than a predetermined angle is detected (step ST15), and the weight 77 is fixed at the position at that time point (step ST16).

Here, in a state where the swing center (swing shaft) of the swing support mechanism 6 and the center of gravity of the movable unit 5 coincide with each other, the swing of the movable unit 5 is suppressed when an external force is applied. Therefore, if the weight 77 is fixed at a position where the inclination of the movable unit 5 is the smallest (a position where the inclination angle is smaller than a predetermined angle) when an external force is applied while changing the position of the weight 77. The swing center of the swing support mechanism 6 can be aligned with the center of gravity of the movable unit 5.

The vibration generator 150 can also be used in the method of adjusting the center of gravity in which the weight 77 is moved while detecting the inclination of the movable unit 5 by the measuring instrument 161. Further, in the method of adjusting the center of gravity in which the weight 77 is moved while detecting the output from the Hall element 90, the centrifugal force generator 160 can be used instead of the vibration generator 150.

1 ... Optical unit (optical unit with correction function), 2 ... Optical module, 3 ... 1st unit, 4 ... 2nd unit, 5 ... Movable unit (oscillating body), 6 ... Oscillating support mechanism, 7 ... Holder, 8 ... Case body, 9 ... Optical element, 10 ... Imaging element, 11 / 11A / 11B ... Magnetic drive mechanism for rocking, 12 ... Posture return mechanism, 12a ... Virtual surface, 13 ... Rocking drive coil, 14 ... Rocking drive Magnet, 14a ... Magnetized polarization line, 15 ... Magnetic member for returning to posture, 17 ... Swing stopper mechanism, 1
8/19 ... Flexible printed board, 21 ... Rotational support mechanism, 22 ... Fixing member, 24 ... Rotating pedestal, 25 ... Bearing mechanism, 27 ... 1st ball bearing, 28 ... 2nd ball bearing, 31 ... Magnetic drive mechanism for rolling , 32 ... Angle position return mechanism, 32a ... Virtual surface, 35 ... Rolling drive coil, 36 ... Rolling drive magnet, 36a ... Magnetized polarization line, 37 ... Angle position return magnetic member, 37a ... Angle position return magnetism Center of member, 38 ... Rotation stopper mechanism, 39 ... Flexible printed substrate, 40 ... Cover member, 40a ... Opening, 41 ... Movable body, 42 ... Fixed body, 45 ... Cylindrical case, 46 ... Subject side case, 47 ... Body, 48 ... end plate, 49 ... opening, 51-55 ... side plate, 56 ... positioning notch, 57 ... notch, 58 ... body, 59 ... end plate, 60 ... circular opening , 62 ... Holder annular part, 63 ... Holder body, 64 ... Window, 65 ... Vertical frame, 67 ... Positioning notch, 68 ... Notch, 71 ... Optical module holder, 72 ... Lens barrel, 73 ... Substrate, 74 ... Square tube, 75 ... Male thread (fixed area), 77 ... Weight, 77a ... Female thread, 78 / 78A / 78B ... Position adjustment mechanism, 80 ... Bottom plate, 81-84 ... Wall Part, 85 ... Optical module holding part (holding part), 87 ... Convex part for rocking stopper, 88 ... Coil fixing part, 89 ... Hall element fixing part, 90 ... Hall element, 92 ... Magnetic member fixing area, 93 ... Groove , 101 ... 1st rocking support, 102 ... 2nd rocking support, 103 ... movable frame, 104 ... sphere, 112 ... notch, 113 ... step, 114 ... protrusion, 115 ... cylinder, 116 ... Center hole 117 ... Rolling drive magnet holding recess, 118 ... Rotation stopper convex, 120 ... Yoke, 121 ... Yoke holding recess, 122 ... Communication part, 123 ... Cover member fixing convex, 131 ... Pedestal body , 132 ... Shaft, 134 ... Spring seat, 135 ... Ring member, 138 ... Coil fixing part, 140 ... Hall element, 142 ... Peripheral wall, 143 ... Protrusion, 144 ... Magnetic member fixing area, 145 ... Groove, 146 ... Opening Part 148 ... Fixed area, 149 ... Detection part, 150 ... Vibration generator, 150a ... Pedestal part, 150b ... Drive part, 152 ... Outer surface, 151 ... Stepped protrusion, 153 ... Protrusion, 155 ... Projection, 160 ... Centrifugal force generator, 160a ... Pedestal part, 160b ... Drive part, 161 ... Measuring instrument, L1 ... Rotation axis, R1 ... 1st axis, R2 ... 2nd axis

Claims (8)

A rocker that holds the optical element and
A swing support mechanism that swingably supports the rocking body between a reference posture in which a preset axis and an optical axis coincide with each other and an inclined posture in which the optical axis is tilted with respect to the axis.
A support that supports the rocking body via the rocking support mechanism, and
It has a weight for aligning the swing center of the rocking body with the center of gravity of the rocking body in the axial direction.
The rocking body includes a fixing area for fixing the weight.
An optical unit with a runout correction function, wherein the fixed position of the weight can be changed in the optical axis direction within the fixed region. It has a position adjusting mechanism for moving the fixed position within the fixed region, and has a position adjusting mechanism.
The rocking body includes a tubular portion coaxial with the optical axis of the optical element.
The fixed region is an outer peripheral surface portion of the tubular portion that faces outward in the radial direction.
The weight is annular, and the tubular portion is inserted into the center hole thereof.
Claim 1 is characterized in that the position adjusting mechanism includes a female screw portion provided on the inner peripheral surface of the weight and a male screw portion provided in the fixed region and screwed into the female screw. Optical unit with runout correction function described in. It has a position adjusting mechanism for moving the fixed position within the fixed region, and has a position adjusting mechanism.
The rocking body includes a tubular portion coaxial with the optical axis of the optical element.
The fixed region is an outer peripheral surface portion of the tubular portion that faces outward in the radial direction.
The weight is annular, and the tubular portion is inserted into the center hole thereof.
The position adjusting mechanism includes a plurality of protrusions provided at different positions in the circumferential direction and the axial direction in the fixed region, and each of the plurality of protrusions protruding from the weight in the axial direction and the plurality of protrusions from the axial direction. With a contact part that can be contacted with,
Shake correction according to claim 1, feature that fixed position of the weights to change the projection to abut the abutment portion by rotating the weights in the axis line is moved in the axial direction Optical unit with function. The optical unit with a runout correction function according to claim 2 or 3, wherein the weight includes a locking portion for locking a jig in a portion that can be seen when viewed from the axial direction. The rocking body includes a lens barrel that holds the optical element on the inner peripheral side.
The optical unit with a runout correction function according to claim 2 or 3, wherein the tubular portion is a part of the lens barrel. The rocking body includes a lens barrel that holds the optical element on the inner peripheral side, and a lens barrel holder that has a tubular holding portion that holds the lens barrel from the outer peripheral side.
The optical unit with a runout correction function according to claim 2 or 3, wherein the tubular portion is a part of the holding portion. An oscillating magnetic drive mechanism that oscillates the oscillating body,
It has a fixed body that supports the rocking body via the support, and
The rocking magnetic drive mechanism includes a coil fixed to one of the rocking body and the fixed body, and a magnet fixed to the other and facing the coil in the radial direction.
The optical unit with a runout correction function according to any one of claims 1 to 6, wherein the magnet is polarized and magnetized in two in the axial direction. The runout correction according to claim 7, wherein the swing magnetic drive mechanism includes a Hall element that is attached to the side of the swing body and the support on which the coil is fixed and faces the magnet. Optical unit with function.

Images